Fix settings processing in WordDelimiterTokenFilterFactory
Improve stability of RecoveryPercolatorTests

Without "action.wait_on_mapping_change" setting set to true, the test node might get shutdown before updated mapping is saved.
Move action.wait_on_mapping_change setting to pom
Remove XTermsFilter and UidFilter in favour of Lucene 4.1 TermsFilter
Throw a more meaningful message when no document is specified for indexing
Attempt to fix "No active shards" failure
Added more info to assert
Fixes size assertion failure.
add priority support for cluster state updates